If you just want to try some queries, there is a public sparql wikidata endpoint at https://query.wikidata.org https://query.wikidata.org . If you press on the

If you just want to try some queries, there is a public sparql wikidata endpoint at https://query.wikidata.org https://query.wikidata.org . If you press on the file folder icon there are example queries, which let you get a feel for the query language.